Add IsSecure() to Transport

transport.go

@@ -2,8 +2,11 @@ package xmpp
 
 import (
 	"crypto/tls"
+	"errors"
 )
 
+var TLSNotSupported = errors.New("Transport does not support StartTLS")
+
 type TransportConfiguration struct {
 	// Address is the XMPP Host and port to connect to. Host is of
 	// the form 'serverhost:port' i.e "localhost:8888"
@@ -19,6 +22,8 @@ type Transport interface {
 	DoesStartTLS() bool
 	StartTLS(domain string) error
 
+	IsSecure() bool
+
 	Read(p []byte) (n int, err error)
 	Write(p []byte) (n int, err error)
 	Close() error